Cake of soap



l atented Oct. 26, 1931 UNITED STATES PATENT OFFICE CHARLES ARCHIIBALDCRABY, OI 'W'YOHI ING, AND THOIAB 1. MY, bl IIDDLEPOBT,

. OHIO cm 01 SOAP Application med October is, 1028. Serial in. 818,828.

This invention relates to soap in cake form, one of. the objects beingto provide a hard milled soap, cocoa soap, glycerine soap, etc., whichis capable of floating without necessi- 5 tating the use of foreignsubstances of a buoyant nature.

As is well known to those skilled in the art floating soaps have beenmade by beating air into the stock'before molding t e same into cakes.This has produced soap in cake form that will float but, because of themass of minute air cells throughout the bulk of the cake, said c'ake hassoftened rapidly when placed in water,-thereby causing considerable 1r;waste. Furthermore the cake has been easily broken.-

The most desirable soap is a hard one, suchas pumice, castile, coco'a,glycerine, or milled soap none of which soften readily but can .19'usuallybe worn down to a thin wafer. Such soaps, however, are heavierthan water and, therefore, will not float. For" this reason only'theyare not preferred by some persons for use in lieu of the softer, lessdurable, but

floating soaps.

It is an ob'ect provide any of the foregoing kinds ofhard soap whichwill float, it being unnecessary to use anyforeign buoyant substance forthis 80 purpose.

Another object is to provide a soap in which the means utilize forrendering it buoyant can also be employed as a means for outlining adistinctive nameor mark which will remain in the soap and be legible atall times until the cake is worn to a thin .wafer.

A-further object is-to provide a soap in which the means utilized forrendering it buoyant-also serves to hasten the curin of 40 the soap withthe result that, instead 0 requiring a curing action extending overseveral months or more, the soap can be completely cured or-har'denedwithin a fewweeks:

With the foregoing and other 'obje ts in view which will appear as thedescription proceeds the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed I and claimed it being understood that changes of the presentinvention toin the precise embodiment of the invention herein disclosedmaybe made within the scope of what is claimed without departing fromthe spirit of'the invention.

In the accom anying drawings the preflerred forms oi the mvention havebeen s own.

In' said drawings,

Figure 1 is a plan view of a cake ofsoap embodying the presentimprovements.

1 Figure 2 is a section on line 2'-'2, Figure 1.

Figure 3 is a plan View of another form of a cake of soap.

Figure 4 is a section on line 44, Figure 3.

Figure 5 is a plan view of another modified form.

Figure 6 is a section on line 6 6, Figure 5.

Referring to the figures by characters of reference, 1 designates a cakeof hard soap such as herein mentioned which can be of any desiredcontour and size. In the structure illustrated a distinctive design hasbeen molded on the cake as shown at 2 and this design has been'outlinedby a plurality of elongated recesses 3 extendin inwardly close to thecenter of the cake. ach recess thus constitutes an air pocket and thetotalarea of the recesses is suflicient to hold more'than enough air tocompensate for the slight difference in the specificgravity between thesoap and water. Thus it will be seen that when a cake of soap rovidedwith these air pockets is placed in a ody of water sufficient air willbe trapped in certain of the pockets to render the cake buoyant. As'thecake is worn down through use the depth of the pockets will of course bereduced but as the size of the cake is correspondingly reduced thebuoyancy of the cake will be maintained untilthe cake is reduced to athin and substantially useless wafer.

Not only are the pockets or recesses 3 useful as a mean for trap ing airand rendering the soap buoyant, but t ey are also useful because the ppreserve the distinctive name or mark out 'ned thereby, as the cakebecomes worn. Thus the brand of the cake can be identified at differentstages of use. A further im ortant advantage resides in the fact that tese pockets or'recesses expose the interior portion 100 of the cake tothe air so that the time required to completely harden the cake bycuring is greatly reduced.

' In Figures 3 and 4 there has been shown a 5 cake of soap 4 thedistinguishing mark on which consists of longitudlnal ribs 5 formed"between grooves 6 pressed into the opposed faces of the cake. Betweenthese grooved faces are formed longitudinal cells 7 dis- 10 posed instaggered relation and which have the same function as the cells 3heretofore described. As the ribbed or corrugated faces of the cakebecome worn through, the cells 7 adjacent thereto will become exposed,thereby presenting additional .ribs which will identlfy the brand. Itmight be added that these ribs have the further function of preventinthe cake from sli ping easily out of the han In the form il ustratedFigures 5 and 6 the soap brand consists of a series of cells or pocketsalong the edges of the faces of the 1 cake. These pockets or cells,indicated at 8, converge toward the center of the cake 9 and when thecake is placed in a body of water enough air will be trapped in some ofthe cells to render the cake buoyant.

When any of the cakes of soap are used the cells will become partly orentirely filled with lather but this will not reduce the buoyancy of thesoap cake because air in suflicient quantities to render the cakebuoyant will be mixed with the-lather. Some of the cells will alsobecome sealed by the compression of soap at the outer ends thereof butthis obviously serves to trap the air in the cells.

What is claimed is: Y

1. A cake of milled soap having bores extending thereinto from opposedortions of the cake, said bores being of sma 1 diameter but ofsufiicient depth and number to render the cake buoyant, the outer endsof the bores bleingd substantially open and the inner ends 0 o 2. A cakeof milled soap having bores extending thereinto from opposed portionsofv the cake, said bores being of small diameter but of suflicient depthto render the cake buoyant, the outer ends of the bores beingsubstantially open and the inner ends closed,

and cooperating to define a distin ishing mark irrespective of the shapeto w 'chthe cake is worn by ordinary use. p

In testimony that we claim the foregoing as our own, we have heretoafiixed our signatures.

CHARLES ARCHIBALD CRARY. THOMAS F. CRARY.

